Different from commercial hardware standards, civil hardware accessories have been used for a long time and are prone to many problems here and there. Especially the door lock, which is a part of high load operation, has a long service life, and it is inevitable that there will be a little failure. It is often found that some users and friends, the damage of the door lock in their home is often caused by improper use or maintenance.

As the name implies, door lock is a device used to lock the door to prevent others from opening the door. There are many types of door locks, and the requirements for door locks are different in various occasions. Ordinary families usually use anti-theft door locks, which are safe and cheap.